Hach Co.'s DR 900 Handheld Colorimeter allows for quick and easy access to your most used testing methods. Time savings is the main driver behind the new DR 900, Hach says. The colorimeter provides the ability to test 90 of the most commonly tested water methods, while putting your favorite methods at your finger tips. By improving the user interface and method selection options, ease of testing is the standard and not the exception for this instrument. The field-ready DR 900 is made for use in harsh and challenging field environments. Ruggedly constructed, waterproof, dustproof, drop tested and shock resistant, this colorimeter ensures reliability in all conditions. The instrument has a backlit display option for use in low light areas with the push of a button. The DR 900 can store data from up to 500 tests, and comes with a USB port for easy data transfer to a PC or laptop after a day in the field.